Gallo Center Director of Marketing and Public Relations Doug Hosner said the spring calendar is always left more open at the beginning of each season so shows can be added when special opportunities arise.

“These additional shows represent the diversity of programming the center likes to present,” Hosner said. “No two of them are alike.”

This will be King’s first appearance at the Gallo Center, though his constant touring schedule has brought him to the region in the past. Considered the King of the Blues by many, King and his trademark black Gibson electric guitar (affectionately known as “Lucille”) have earned 15 Grammy Awards, been inducted into the Rock and Roll Hall of Fame and awarded the Presidential Medal of Freedom.

He last played the Central Valley in 2009, when he had a show at the Turlock Community Theatre. Tickets will range from $49 to $99.

Also returning to the region will be the wildly popular Internet stars The Piano Guys. The four-man group features a pianist, cellist, producer and videographer who have parlayed online fame into a successful performing career. The men are known for their mash-up arrangements that mix rock, classical and pop.

Last June the group sold-out two shows at the Gallo Center. They will be back to perform two shows again and tickets will range from $19 to $69.

The Nitty Gritty Dirt Band first came on the scene in the 1960s as a country-folk outfit out of Long Beach. The group has evolved and revolved its membership over the years. Its hits include “Mr. Bojangles” and “Will the Circle Be Unbroken.” Tickets are $20 to $50.

The San Francisco Scottish Fiddlers are a 50-member ensemble backed by piano, drums, cellos, guitars and harps. Tickets are $15 to $39.

Author and doctor Alexander is known for his bestselling book “Proof of Heaven: A Neurosurgeon’s Journey through the Afterlife,” in which he recounts his experience with a near-death experience. Tickets are $19 to $69.

Tickets to all the new shows are on sale now and can be purchased at www.galloarts.org, by calling (209) 338-2100 or visiting the Gallo Center ticket office at 1000 I St.